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seaweedfs/weed/filer2/mysql/mysql_store.go

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package mysql
import (
"database/sql"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/filer2"
"github.com/chrislusf/seaweedfs/weed/filer2/abstract_sql"
"github.com/chrislusf/seaweedfs/weed/util"
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_ "github.com/go-sql-driver/mysql"
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)
const (
CONNECTION_URL_PATTERN = "%s:%s@tcp(%s:%d)/%s?charset=utf8"
)
func init() {
filer2.Stores = append(filer2.Stores, &MysqlStore{})
}
type MysqlStore struct {
abstract_sql.AbstractSqlStore
}
func (store *MysqlStore) GetName() string {
return "mysql"
}
func (store *MysqlStore) Initialize(configuration util.Configuration, prefix string) (err error) {
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return store.initialize(
configuration.GetString(prefix+"username"),
configuration.GetString(prefix+"password"),
configuration.GetString(prefix+"hostname"),
configuration.GetInt(prefix+"port"),
configuration.GetString(prefix+"database"),
configuration.GetInt(prefix+"connection_max_idle"),
configuration.GetInt(prefix+"connection_max_open"),
configuration.GetBool(prefix+"interpolateParams"),
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)
}
func (store *MysqlStore) initialize(user, password, hostname string, port int, database string, maxIdle, maxOpen int,
interpolateParams bool) (err error) {
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store.SqlInsert = "INSERT INTO filemeta (dirhash,name,directory,meta) VALUES(?,?,?,?)"
store.SqlUpdate = "UPDATE filemeta SET meta=? WHERE dirhash=? AND name=? AND directory=?"
store.SqlFind = "SELECT meta FROM filemeta WHERE dirhash=? AND name=? AND directory=?"
store.SqlDelete = "DELETE FROM filemeta WHERE dirhash=? AND name=? AND directory=?"
store.SqlDeleteFolderChildren = "DELETE FROM filemeta WHERE dirhash=? AND directory=?"
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store.SqlListExclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=? AND name>? AND directory=? ORDER BY NAME ASC LIMIT ?"
store.SqlListInclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=? AND name>=? AND directory=? ORDER BY NAME ASC LIMIT ?"
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sqlUrl := fmt.Sprintf(CONNECTION_URL_PATTERN, user, password, hostname, port, database)
if interpolateParams {
sqlUrl += "&interpolateParams=true"
}
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var dbErr error
store.DB, dbErr = sql.Open("mysql", sqlUrl)
if dbErr != nil {
store.DB.Close()
store.DB = nil
return fmt.Errorf("can not connect to %s error:%v", sqlUrl, err)
}
store.DB.SetMaxIdleConns(maxIdle)
store.DB.SetMaxOpenConns(maxOpen)
if err = store.DB.Ping(); err != nil {
return fmt.Errorf("connect to %s error:%v", sqlUrl, err)
}
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return nil
}